Other
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...260..655z&link_type=abstract
Astrophysical Journal, Part 1, vol. 260, Sept. 15, 1982, p. 655-699.
Other
65
Binary Stars, Helium, Infrared Spectra, K Lines, Late Stars, X Ray Spectra, Dwarf Stars, F Stars, G Stars, Giant Stars, K Stars, Spectrum Analysis, Supergiant Stars, Tables (Data)
Scientific paper
A comparison with K line, X-ray and other data, of 10830 A equivalent widths (EW) measurements in 890 image tube spectra of 455 stars shows that for the case of G stars, the EW correlates well with K line intensity. Good correlation is also found between 10830 A EW and soft X-ray fluxes, confirming the excitation of the line by coronal soft X-rays, which can serve as a measure of coronal emission. It is also found that, in contradiction to published models, 10830 A is weak or absent in O, B and A stars, and is absent in F and M supergiants. Moderate to high 10830 A EW is frequent in F and M dwarfs, G and K supergiants, and class K3 III. The 58 stars whose 10830 A EW was found to be of 300 A or more should be relatively intense X-ray emitters. Almost all RS CVn stars show strong 10830 A absorption, and T Tauri stars show both absorption and emission.
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